Results 41 to 50 of about 1,782 (160)

A Microkrystite from the Australasian Tektite/Microtektite Strewn Field

Meteoritics &Planetary Science, EarlyView.
Abstract Microkrystites are glassy impact spherules. They contain primary crystallites carrying information on the physical and chemical conditions prevailing during vaporization, melting, and ejection in large impact cratering events. We report on the geochemistry and mineralogy down to nanometer scale of the first microkrystite (ODP1144A,14) from the
Matteo Del Rio, Luigi Folco, Matteo Masotta, Ana Černok, Enrico Mugnaioli   +4 more
wiley   +1 more source

Water and hydroxyl on asteroid Bennu: Reconciling remote observations with OSIRIS‐REx sample analysis

Meteoritics &Planetary Science, EarlyView.
Abstract This study investigates the spatial distribution and spectral characteristics of the broad hydration feature near 3 μm across the surface of asteroid (101955) Bennu using OVIRS (OSIRIS‐REx Visible and InfraRed Spectrometer) data. We analyzed multiple global OVIRS data sets obtained at different times throughout the Bennu day, revealing ...
Hannah H. Kaplan, Amy A. Simon, Victoria E. Hamilton, Joshua P. Emery, Dennis Reuter, Andy J. López‐Oquendo   +5 more
wiley   +1 more source

The Study of Extrasolar Planetary Systems through Direct Imaging and Infrared Instrumentation [PDF]

, 2023
Direct imaging and spectroscopy is fundamental to understanding the composition, evolution, and formation of exoplanets, and as such these techniques have been given high priority in the 2020 Decadal Survey on Astronomy and Astrophysics.
Lopez, Ronald Alexander
core  

Assessing the analytical capabilities of handheld laser‐induced breakdown spectroscopy (hLIBS) on corroded iron objects of possible meteoritic origin

Meteoritics &Planetary Science, EarlyView.
Abstract Despite meteorites having been recognized as the source of iron in some ancient iron artifacts, few archeological irons have been analyzed so far, as invasive methods are precluded. In this work, four iron knives and one axe collected near Guelmime and Imilchil (Morocco) were investigated by advanced analytical techniques, including handheld ...
Giorgio S. Senesi, Albert Jambon, Olga De Pascale, Lahcen Ouknine, Hassan Nachit, Fouad Khiri, Abderrahmane Ibhi   +6 more
wiley   +1 more source

VUV and mid‐UV photoabsorption cross sections of thin films of glycine and alanine: Application to their photochemistry in the solar system

Photochemistry and Photobiology, EarlyView.
Thin solid films of pure glycine or alanine (thicknesses ranging from 10 to 700 nm) were prepared on MgF2 windows using a vacuum sublimation/recondensation method. VUV‐UV spectroscopy of these films enabled us to characterize new absorption cross sections for glycine and alanine for VUV‐UV radiations between 120 and 300 nm.
Juliette Pastore, Hervé Cottin, Kafila Saïagh, Jodie Belilla, Fabien Stalport, Nicolas Fray, Nathalie Carrasco   +6 more
wiley   +1 more source

Building a Continental‐Scale Geodetic Network: The Plate Boundary Observatory (PBO)

Perspectives of Earth and Space Scientists, Volume 7, Issue 1, December 2026.
Abstract The Plate Boundary Observatory (PBO) transformed the use of geodesy in North America to study crustal deformation and plate boundary processes by establishing a continental‐scale, standardized, open‐access geodetic network. Built and operated by UNAVCO between 2003 and 2018 as part of the National Science Foundation (NSF)‐funded EarthScope ...
Emily E. Zawacki, Michael E. Jackson, Glen S. Mattioli, David J. Mencin, Karl Feaux, Donna J. Charlevoix   +5 more
wiley   +1 more source

Introduction to optical/infrared interferometry History and basic principles

, 2020
The present videos refer to a 10-hour lecture series delivered at IUCAA in April 2018. They are accompanied by notes referring to a lecture delivered on 27 September 2017 in Roscoff during the "2017 Evry Schatzman School", edited in "Instrumentation and ...
Surdej, Jean
core   +1 more source

A Field Guide to Corralling the Chaos: A Planning Framework for Using Models to Guide Opportunistic Field Studies of Natural Disturbances

Perspectives of Earth and Space Scientists, Volume 7, Issue 1, December 2026.
Abstract Watersheds regulate biogeochemical processes and provide ecosystem services to human societies, but disturbances can fundamentally alter these processes across space and time. Determining when and where to sample to capture disturbance impacts in watersheds remains a central challenge.
Peter Regier, James C. Stegen, Sundar Niroula, Brieanne Forbes, Amy E. Goldman, Nicholas D. Ward, Jake Cavaiani, Lupita Renteria, Xingyuan Chen, Allison N. Myers‐Pigg   +9 more
wiley   +1 more source

Best Practices in Open and Reproducible Antarctic Marine Sediment Core Research

Perspectives of Earth and Space Scientists, Volume 7, Issue 1, December 2026.
Abstract Marine sediment cores from Antarctica are archived by national programs for reuse and resampling by future researchers, creating a resourceful way to conduct Antarctic science. With reduced budgets to conduct Antarctic field work and to collect new sediment cores offshore of the icy continent, the accessibility of these archived cores and ...
L. E. Miller, R. A. Venturelli, L. O. Prothro, N. Varela, M. Szemak, J. Ruggiero, A. Vega‐González, A. P. Lepp, V. Stanley, K. Vadman, C. Fritz, K. Tinto, F. Nitsche   +12 more
wiley   +1 more source

The Andromeda Study: A Femto-Spacecraft Mission to Alpha Centauri. arXiv: Instrumentation and Methods for Astrophysics

, 2017
This paper discusses the physics, engineering and mission architecture relating to a gram-sized interstellar probe propelled by a laser beam. The objectives are to design a fly-by mission to Alpha Centauri with a total mission duration of 50 years travelling at a cruise speed of 0.1c.
Hein, Andrea, Long, Kelvin, Fries, Dan, Perakis, Nikolaos, Genovese, Angelo, Zeidler, Stefan, Langer, Martin, Swinney, Rob, Davies, John, Cress, Bill, Casson, Marc, Mann, Adrian, Armstrong, Rachel   +12 more
openaire   +1 more source